is this fan best 120x38 for under 10cdn? i just check the chart... it does perform zm-f3 except noise ratio...

If you're looking for cheap, then I suppose the Ultra Kaze's are worth looking at, but they're definitely inferior to both Panaflo and Delta's 38mm fans. Personally, I'd just stick to the Zalman fans, especially if you're using two triple rads. Very, very little that that combo can't handle with ease.

Again, probably not worth it, looking at the system in your sig. A pair of triple rads with ZM-F3's is already technically overkill, and will likely keep your water temperatures quite close to ambient temps as it is. At best, strapping heavier fans might get you a degree, maybe two.